What were the first organisms to have sex? We may never know the answer, but as Bill Nye explains in this Big Think interview, scientists are very interested in why sexual activity remains so popular in nature...

Have Jellyfish Found the Fountain of Youth?

Has the Fountain of Youth been found, in the form of jellyfish? Shin Kubota, a Japanese scientist, discovered that a microscopic species of jellyfish, Turritopsis dohrnii, can grow young, again and again, rejuvenating itself.

"It can live forever, I think,"Kubota told CBS News. Turritopsis dohrnii can age in reverse, like the peculiar protagonist in F. Scott Fitzgerald's "The Curious Case of Benjamin Button." "I want to become young, in the future," Kubota, a stroke survivor, said.

But what can these spineless animals offer us homo sapiens? We're not able to engineer their abilities in humans, yet. The genetic engineering would be quite complicated, or unlikely.